Carbon pile regulator



y 19 50 M. J. NEUNER 2,509106 CARBON PILE REGULATOR Filed Nov. 1, 1948 IN VEN TOR.

MART/N J. NEUNEA Patentecl May 23, 1950 UNI'TED' STAT ES PATENT OFFICE CARBON PILE REGULATOR IM&rtin J. Neuner{Fa irview, N. J. assignor to endix Aviatiopuridration Teterboro, N. J

a eorporation of.Deliwiare Application'November 1, 1948, Serial N0. 57,652

201aims.

1 'The pre'sent'application relates to an electrical regulatorand' more psirticulrly to improvements in aregu1ator of 'the type -disclosed and clai.med in the copending U. S. application Se'rial N0.

now U. S.- Patent N0. '2,481;'77.1, and assined 130 the assig-nee 0fthe present applica;tion.

At thepres'ent timecatbon pile regulators have come into Widespread use Ior such purpose's a;s

ccintroll'i1ig the vdltage ofthe output of generat0rs and*also in the governing of currents.

the principle oi'varying the pressure applied :to ""lihe'cafl0on pile; the range-ofefi'ecoive pressure on'thepfle being the regulating range of 't'he regulator.

There has now come into fairly widespread use a regulaizor which is:of the type disclo'sed in fithe aforenotedappiication and which may in- =(:Iudethe usual ca;rbon pile, on'e end of which ds relatively flxed. Operatatively associated with the other end to app1y pressure onthe pile"is an armatureand this .armature=is carried by a spring 01 the so-ca1led diaphragm type.

The forceoftheelectromagnet'is rendered -effective on thearmature and the diaphragm type spring =above referred'to tendsto urge the arma-- -ture 'towardsthe pi1e, while the magnetic force tendsio Withdra'w -the armature from the pile so as 130 approxmately vary*the force exerted by 'the diaphragmspring inversel-y as the square :of the distancebetween thearmature and mag net so. as 110 efiect b2;s'iq correspondence with cha;nges in th'e magne'ti'c force;

An o'bject of the present invention is to simplify and improve the*aforenoted type of ca1bun warben pile regulator in which a cooling fiuid is carried within a sealed'chamberadjacent the radiating "fin portion 0f the "regulator casing,

und whichcham'ber is providedat each end With sealing rings 01' theO-ririgtype.

Another object uf 'the invention is to so arrange'the aforenoted"fluid 'chamber sothat the same is se&led atone end' by a diaphrag-r'n type armaturespring; while th'e other end is' seale'd by' a novel sea'ling be1lows whieh permits'adjustmenb =of the pile throug'ha suitabl'e -adjustiflg SCI'EW.

Another object of the inVention is so provide in a caibon pile regulator thearrangement 015 a diaphragm type spring which serves the novel doublefunction ofa sea1 and a spring for the armature of"the carbon pile.

'Ihe above and other objects and features cf the invention will appear more fu11y hereinafter from a considera'tion of t-he following description taken"in connection Mth the accompanying -drawing Wherein one embodiment of the invenon is illustrated by way cf example.

The drezwing'is a fragmentary sectional view of a regulator embodying the invention.

Referr-ing to the==drawing, there is provided a 'plate I on which there is mounted a magnet casing 2. The plate I and casing 2 are formed of a suitable ferro-magnetic material.

A eure 5-0f similar material projects from the platze I into an electromagneticwinding l about thecore 5 and positioned' within the casing 2. The plate l is-fastened to the casir;g 2 by suitable screws 9. About the casing2 there is provided a hollow housing or coll'ar H which may be partially filIe'dwith a -suitableeooling liquid 0x gaseous medium through an opening I3 closed by a plug I5.

The' fiui'cl medium within ehe housing H serves t0 cool the coil housing 2 and thehousing H 'furtherhasprovided suitable radiaing fins IT to Xuither' this cooling action. A housing 20 having cooling flns 21 and of a type such as shovvn in U. S. PattentNo. 2;42'7;805 granted September 23, 194'1, toWil1iam G. Neild and assigned to Bendix AViation Corporation, is fastened 130 the coil housing Zbystuds 22. The housing or carbon pi1e casing 20 has a flange portion disposed in {Sufficient spatiality o0 'the magnet casing or housing 2 110 preclude engagement upon longitudinal expansion of the housing 28 relative to 'he magnet casing 2 in response to a rise in tempa1ature, a;s explained in the aforenoted U. S. patent. Mounted in the housing 20 is a n'on-c0nducting tube 25 formed of a suitable refractory material such as porcelain and locked in position by a =suita'ble fastening spring 26. 'Tubular member 25 carries carbon discs 21 forming a, carbon'pile. Suitable channels 29 and '3l tmmed in be casing 213 extend a'longthe tubular -meniber 25 Tor envelapingthe member 25 with a su'ifiable fluid medium for cooling the tubular membe'r 25 ran=d carbon dise 21, as will be explai-ned in great'er detail hereinafter.

A contactor mem-ber 33-1is p0s'itioned between .one en'd-df thecarbon:gxile 21 and pla.'tie 3G. The

=contactor membe: '33 is positioned in a eupshaped supporting member 38 mounted on the plate 36.

The plate 36 is shown in the drawing as positioned at one side of a diaphragm type spring 39. At the opposite side of the diaphragm type spring 39 there is positioned an armature plate 4l. 'Ihe diaphragm type spring 39 is clamped between the plates 36 and 4l by suitable fastening screws 43 one of which is shown in the drawing. 'The diaphragm 39 is formed in a circular shape f a suitable spring material and thickness. Formed in the diaphragm 39 are suitable annular 001- regations 45, 46 and 41 o1 proper depth to provide the desired spring characteristics for matching the varying pul1 of the masnet as the distanee between the armature 4I and magnet core 5 changes.

As shown in the drawing, the diaphragm 39 is positioned in an annular cup-shaped member 59 having a seat portion 52 on which rests an annular edge portion 55. The annular edge portion 55 0f the diaphragm 39 may be clamped about the seat portion 52 and secured thereto by soldering 01 by other suitable fastening means.

It Will be seen then that the diaphragm 39 extends across the cup-shaped member 59 and flexibly suspends armature 41 therein. Axial movement of the armature 4l in the cup-shaped member 59 is accommodated by the kinks er corregations 45, 46 and 41 formed in the diaphragm 39 as diselosed and claimed in the copending application Serial N0. 612,691, filed August 25, 1945, by William G. Neild, now Patent N0. 2,481,771 issued September 13, 1949, and assigned to the assignee of the present application.

'Ihe latter cup-shaped member 59 as shown in the drawing is positioned within an annular flange portion 51 of the magnet housing 2 and between the magnet housing 2 and the carbon pile housing 29. There is positioned an O-shaped sealing ring 59 formecl of a suitable plastic rubber-like material between the bottom of the eupshaped member 59 and the housing 29 to provide a sealing conneotion for a purpose Which Will be described hereinafter.

At the opposite end of the carbon pile 21 there is provided a contactor member GI positioned in a cup-shaped member 63 mounted at one end -of a sealing bellows S5. 'Ihe opposite end of the sealing bellows 95 is secured at 61 by soldering or othe1 suitable means to a plug 69 secured in a casing member H by brazing 01 soldering.

ScreW-threaded member 13 is fastened to the plug E9 and casing 1l by a suitable securing screw 15. Adjustably mounted in the member 13 is a screW-threaded acljustment holt 11 which contacts one end of the member 19 slidably mounted in the plug 99 and secured at its opposite end 89 to the inner end of the bellows 65. 'Ihe casing 11 is secured to the other end of the casing 29 by suitable bolts 82 and is electrically insulated from the casing 29 by suitab1e insulating washers 8 1, 89 and 88. There is further provided between tne end of the casing 29 and the casing 11 an O-shaped sealing ring 99 formed 0f a suitable rubber-like p1astic material. A tubular member 99 projects through the casing 1l and op@ns into the interior 95 thereof. It willbe seen then that through the provision o1 the novel O-shaped sealing rings 59 anal 99, the interior 95 cf the casing 15, passages 3I and 29 in casing 29 and the interior of the cup-shaped member 59 sealed by diaphragm 39 forms a sealed chamber which may be filled with a suitable cooling liquid such as oi1 or with a gaseous medium such as helium z under pressure, which may be introduced into the sealed chamber by first evacuating the same through the conduit 93, after which the fiuid may be introduced thereto and the tube 93 sealed 011 as by pinching or soldering. The liquid cooling medium may only partially fill the sealed system and is arranged to conduct heat from the carbon pi1e 21 to the outer cooling fins 2l of the casing 29. However, when filled with a cooling gas such as helium under pressure, it will be seen that the diaphragm 39 servs the double function of a seal and also as a spring for the armature and that through the medium of the helium gas in the sealed chamber an advantageous damping effect upon the diaphragm spring will be effected, as well as the superior cooling efiect on the carbon pile 21 voted heretofore.

Moreover, in the sealed chamber immediately about the carbon pi1e 21 there may be provided a fluid or liquid medium to envelop the carbon pile and conduct heat from the carbon pile to the casing fins 2I. One end of the chamber is sealed by the diaphragm armature spring 39, while the other end is sealed by the sealing bel- .lows 65 which permits adjustment of the pile through the adjusting screw 11 without disturbing the sealed relationship of the chamber. The sealed chamber is further effected through the novel arrangernent of the 0-shaped sealing rings 59 and 99 at the opposite ends 01 the carbon pile housing 29 which rings cooperate with the eupshaped member 59 and the casing mernber 11 to effect the desired sealed chamber immediately ad.iacent the carbon discs 21 at the opposite ends and about the sides of the same f01 effecting the desired cooling action.

Although only one ernbodiment of the invention has been illustrated and described, various changes in the form and relative arrangements of the parts may be made to suit requirements.

What is clairned is:

1. In a carbon pile regulator, an electromagnet including a core, a housing for said electromagnet, a stack of discs of resistant material, a casing for said discs, said casing aflixed to said housing and having an end portion fitting loosely abou an end portion of said housing to permit expansion and contraction of said casing relative to said housing with changes in temperature, the

casing having a const1'icted section about the assembled stack, radiating fins ca-rried in spaced relation about the constricted section of the casing, a cup-shaped member positioned between the housing and casing, a diaphragm sealing one end of the cup-shaped member, an armature ca1- ried by said diaphragm and cooperating with said core, said diaphragm having the outer edge thereof anchored to said cup-shaped member, said armature being disposed to control the pressure applied at one end of said discs, a second housing at the other end of said. discs and affixed to said casing, said casing having passage rneans extending along said discs from the interior of said cup-shaped member and the interior of said second housing, an annular ring of rubbe1'like material positioned between said eupshaped member and said casing, and another annular ring of rubber4ike material positioned between said casing ancl said second housing to provide a sealed chamher including said passage 'means and the interior of the cup-shaped member and the interior of said second housing to hold a fluid heat condu cting medium therein and adjacent the discs.

2. In a carbon pile regulator, an electromagnet including a core, a housing for said. electromagnet, a stack 01 discs 013 resistant material, a casing for said. discs, the casing having a constricted section about the assembled stack, radiating fins carried in spaced relation about the constricted section of the casing, a cup-shaped member positioned between the housing and casing, a diaphragm sealing one end of the cup-shaped memher, an armature carried by said diaphragm, and coopexating with said. core, said diaphragm having the outer edge thereof anchored to said eupshaped member, said armature being disposed to conorol the pressure applied ab one end of said discs, a second housing ab the other end of said discs, an adjustable member mountecl at the other end of said discs, an exteriorly adjustable screw extending through said second housing for effecting adjustment of said member and said discs thereohrough, a sealing bellows supporting said member and surrounding said screw so as to seal the interior of said second housing, said casing having passage means extending along said discs frorn the interior of said cup-shaped member and the interior of said second housing, an annular ring of rubber-like material positioned between said cup-shaped member and. said casing, and another annular ring of rubber-like material positioned. between said casing and said second housing to provide a sealed chamber including said passage means and the interior of the cup-shaped member and the interior of said second housing, and a sealable tubular member opening into said second housing for supplying a fluid heat conducting medium to said chambar.

MARTIN J. NEUNER.

REFERENCES CITED The following references are of 1ecord in the file of this patent:

UNITED STATES PATENTS Number Name Date 2384786 Austin Sept. 18, 1945 2,393952 Austin Feb. 5, 1946 2419,491 Gartner Apr. 22, 1947 2434182 Taplin Jan. 6 1948 

